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CVE-2025-48865 Detail

Description

Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients to remove X-Forwarded headers (except X-Forwarded-For) due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should trust these headers, allowing HTTP clients to remove or modify them creates potential security vulnerabilities. Some of these custom headers can be removed and, in certain cases, manipulated. The attack relies on the behavior that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been patched in version 1.6.6.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/fabiolb/fabio/commit/fdaf1e966162e9dd3b347ffdd0647b39dc71a1a3
https://github.com/fabiolb/fabio/releases/tag/v1.6.6
https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf
https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf

Weakness Enumeration

CWE-ID CWE Name Source
CWE-348 Use of Less Trusted Source GitHub, Inc.  
CWE-345 Insufficient Verification of Data Authenticity GitHub, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-48865
NVD Published Date:
05/30/2025
NVD Last Modified:
05/30/2025
Source:
GitHub, Inc.